/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ---------------------------
 * CategoryLabelWidthType.java
 * ---------------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 24-Mar-2004 : Version 1 (DG);
 *
 */

package net.droidsolutions.droidcharts.core.axis;

import java.io.ObjectStreamException;
import java.io.Serializable;

/**
 * Represents the width types for a category label.
 */
public final class CategoryLabelWidthType implements Serializable {

	/** For serialization. */
	private static final long serialVersionUID = -6976024792582949656L;

	/** Percentage of category. */
	public static final CategoryLabelWidthType CATEGORY = new CategoryLabelWidthType(
			"CategoryLabelWidthType.CATEGORY");

	/** Percentage of range. */
	public static final CategoryLabelWidthType RANGE = new CategoryLabelWidthType(
			"CategoryLabelWidthType.RANGE");

	/** The name. */
	private String name;

	/**
	 * Private constructor.
	 * 
	 * @param name
	 *            the name (<code>null</code> not permitted).
	 */
	private CategoryLabelWidthType(String name) {
		if (name == null) {
			throw new IllegalArgumentException("Null 'name' argument.");
		}
		this.name = name;
	}

	/**
	 * Returns a string representing the object.
	 * 
	 * @return The string (never </code>null</code>).
	 */
	public String toString() {
		return this.name;
	}

	/**
	 * Returns <code>true</code> if this object is equal to the specified
	 * object, and <code>false</code> otherwise.
	 * 
	 * @param obj
	 *            the other object.
	 * 
	 * @return A boolean.
	 */
	public boolean equals(Object obj) {

		if (this == obj) {
			return true;
		}
		if (!(obj instanceof CategoryLabelWidthType)) {
			return false;
		}
		CategoryLabelWidthType t = (CategoryLabelWidthType) obj;
		if (!this.name.equals(t.toString())) {
			return false;
		}
		return true;

	}

	/**
	 * Ensures that serialization returns the unique instances.
	 * 
	 * @return The object.
	 * 
	 * @throws ObjectStreamException
	 *             if there is a problem.
	 */
	private Object readResolve() throws ObjectStreamException {
		if (this.equals(CategoryLabelWidthType.CATEGORY)) {
			return CategoryLabelWidthType.CATEGORY;
		} else if (this.equals(CategoryLabelWidthType.RANGE)) {
			return CategoryLabelWidthType.RANGE;
		}
		return null;
	}

}
